INNODB_ERROR|Flagged corruption of `iv` in table X.X in CHECK TABLE; Wrong count

  --source include/have_innodb.inc

  --source include/have_debug_sync.inc

  --echo #

  --echo # Online ADD INDEX on a virtual column which is not part of any index yet.

  --echo # A concurrent INSERT writes NULL for the virtual column into the new index.

  --echo #

  CREATE TABLE t (id INT PRIMARY KEY, k INT NOT NULL, v INT AS (k + 3) VIRTUAL) ENGINE=InnoDB;

  INSERT INTO t (id, k) VALUES (1, 1);

  --connect (con1,localhost,root,,test)

  SET DEBUG_SYNC = 'row_log_apply_before SIGNAL built WAIT_FOR go';

  --send ALTER TABLE t ADD KEY iv (v)

  --connection default

  SET DEBUG_SYNC = 'now WAIT_FOR built';

  INSERT INTO t (id, k) VALUES (2, 10);

  SET DEBUG_SYNC = 'now SIGNAL go';

  --connection con1

  --reap

  --disconnect con1

  --connection default

  SET DEBUG_SYNC = 'RESET';

  --echo # Correct result: (1,4) and (2,13)

  SELECT id, v FROM t FORCE INDEX (iv);

  CHECK TABLE t EXTENDED;

  DROP TABLE t;

2026-09-23  7:20:01 4 [ERROR] InnoDB: Flagged corruption of `iv` in table `test`.`t` in CHECK TABLE; Wrong count

    Rel    o/d  Build   Commit                                    UniqueID observed             

CS  10.11  dbg  090926  2753b5919a10abd32ba822877c6a1cbf602d3748  No bug found                  

CS  10.11  opt  090926  2753b5919a10abd32ba822877c6a1cbf602d3748  No bug found                  

CS  11.4   dbg  090926  42038e1145dd43b3910055c364fb720a8a152d61  INNODB_ERROR|Flagged corruption of `iv` in table X.X in CHECK TABLE; Wrong count

CS  11.4   opt  090926  42038e1145dd43b3910055c364fb720a8a152d61  No bug found                  

CS  11.8   dbg  090926  e2e060ce3d8c3ce11b6c7ba28ced0f1a30c50a54  INNODB_ERROR|Flagged corruption of `iv` in table X.X in CHECK TABLE; Wrong count

CS  11.8   opt  090926  e2e060ce3d8c3ce11b6c7ba28ced0f1a30c50a54  No bug found                  

CS  12.3   dbg  090926  e9f84a1fdf7093191e55b55dc14b08b9d4ebaa20  INNODB_ERROR|Flagged corruption of `iv` in table X.X in CHECK TABLE; Wrong count

CS  12.3   opt  090926  e9f84a1fdf7093191e55b55dc14b08b9d4ebaa20  No bug found                  

CS  13.0   dbg  090926  b2c4e675049e23ce8c7346985f40840fcd4e583f  INNODB_ERROR|Flagged corruption of `iv` in table X.X in CHECK TABLE; Wrong count

CS  13.0   opt  090926  b2c4e675049e23ce8c7346985f40840fcd4e583f  No bug found                  

CS  13.1   dbg  090926  02c842c30dcb05a962eaac58c69920e6be3369cf  INNODB_ERROR|Flagged corruption of `iv` in table X.X in CHECK TABLE; Wrong count

CS  13.1   opt  090926  02c842c30dcb05a962eaac58c69920e6be3369cf  No bug found                  

ES  10.6   dbg  090926  aa3fb9800c358182ee2a1f8cca8ffbdd6d0a37eb  INNODB_ERROR|Flagged corruption of `iv` in table X.X in CHECK TABLE; Wrong count

ES  10.6   opt  090926  aa3fb9800c358182ee2a1f8cca8ffbdd6d0a37eb  No bug found                  

ES  11.4   dbg  090926  32807340954440071ca8ae8e2de51fb180d134c6  INNODB_ERROR|Flagged corruption of `iv` in table X.X in CHECK TABLE; Wrong count

ES  11.4   opt  090926  32807340954440071ca8ae8e2de51fb180d134c6  No bug found                  

ES  11.8   dbg  090926  c4af6f687a2dd983072457429aa2294f11957650  INNODB_ERROR|Flagged corruption of `iv` in table X.X in CHECK TABLE; Wrong count

ES  11.8   opt  090926  c4af6f687a2dd983072457429aa2294f11957650  No bug found                  

ES  12.3   dbg  090926  c3bd5108d81f19e33efb93f7b6ae971293732fd0  INNODB_ERROR|Flagged corruption of `iv` in table X.X in CHECK TABLE; Wrong count

ES  12.3   opt  090926  c3bd5108d81f19e33efb93f7b6ae971293732fd0  No bug found